Blast-furnace.



P. m: SIMONEY BLAST FURNACE. APPLICATION FILED MAY 5. I916- 8 Y Z I i /JI o WW I y 24590191. 675 51/40/102) 5 I 12 Patented July 25, 1916;

PASQUALE DE SIMONEY, 0F YOUNGSTOWN, OHIO.

BLAST-FURNACE.

Specification of Letters Patent.

Patented July 25, 1916.

Application filed May 5, 1916. Serial No. 95,654.

To all w hem it may concern Be it known that I, PASQUALE Dn SIMO- NEY, acitizen of the United States, residing at Youngstown, in the county ofMahoning and State of Ohio, have invented certain new and usefulImprovements in Blast-Furnaces, of which the following is aspecification.

This invention relates to metallurgical furnaces, and has particularreference to a novel improvement therein for collecting Solid matter anddust blown from the explosion pipes.

As is well known in the operation of blast furnaces there sometimesoccurs what is known as an explosion, the force of which often expelslarge quantities of hot raw material including lumps as well as a finedust out of the explosion pipes or downcomer tubes, and this material isscattered over the surrounding territory, not only endangering the livesof workmen, but at the same time wasting much raw material. That is tosay, due to some defect or irregularity in the mixing of the materials,the furnace will sometimes hang or stick, which means that part of theraw materials, usually the limestone and coke, in the process ofproduction, will harden and stick to the inner wall of the furnace. Indue time this collection of material on the sides of the furnace isfollowed by what is known as a slip, or in other words, the materialwill, after a certain period, become loose and fall down into thefurnace, thus producing a violent explosion.

Accordingly, the present invention has in view a novel and practicalattachment for the outlet end of the so-called explosion pipes, wherebythe material'thrown out of the furnace, by the action above described,will be collected and returned to the furnace, thus greatly lesseningthe danger hazard in the operation of blast furnaces, and economizing inraw material. I v

A further object of the invention is to provide a device which is simplein con: struction and comparatively. cheap to install and maintain,thereby holding the cost of equipment and maintenance to a minimumfigure, and at the same time providing a device which permits the forceof theexplosion to spend itself withoutdoing any damage to the furnaceor the attachment itself.

That is to say, that although it is proposed to cage-in or house theoutlet end of the ex plosion pipe, it is contemplated to provide aconstruction whereby the force of the explosion may expand sufficientlyon passing out the outlet end of the explosion pipe to prevent thebursting of the latter by back pressure or likewise damaging theattachment.

lVith the above and other objects in view which will more readily appearas the nature of the invention is better understood, the same consistsin the novel construction, combination and arrangement of partshereinafter more fully described, illustrated and claimed.

A preferred and practical embodiment of the invention is illustrated inthe accompanying drawing, in which Figure l is a detail elevation of aportion of a blast furnace showing one of the explosion pipes and thepresent invention applied thereto. Fig. 2 is a vertical sectional viewof the attachment shown in Fig. 1.

Similar reference characters designate corresponding parts throughoutthe several figures of the drawings.

By reference to the accompanying drawing, it will be observed that it isproposed to provide a simple and substantial deviceor attachment whichmay be readily fitted to the outlet end of an explosion pipe of a blastfurnace. Therefore, Fig. 1 shows a portion of a blast furnace B havingthe explosion pipe E extending upwardly therefrom, and the usualcharging port C for receiving the charge of ore and melting flux. Theattachment above referred to, is designated generally as 1, andessentially comprises a substantially cylindrical casing or drum 2having an inclined floor or bottom 3 and an upper cap or closure memberl, thus providing a relatively capacious receivingand collectingcompartment R for the outlet end of the explosion pipe E, as will bemore clearly apparent from Fig. 2. This compartment is accessible forrepairs or cleaning through the manhole M in the side of the drum.

The inclined floor 3 of the receiving and collecting drum preferablyrests upon supporting flanges, rigidly secured to the outer surface ofthe explosion pipe E, at a point below the outlet. Thus, the outlet endof the pipe extends a, considerable distance into the interior of thedrum, and is provided with a cone valve 6, carried at one end of a valvelever 7 pivoted as at 8 in the wall of the drum, and having an operatingconnection 9 for manually operating the valve when desired. The lowerportion of the drum 2 is provided with a coarse material gravity returnpipe connection 10, whose general inclination and arrangement is suchthat the inside surface 11 thereof is 111 ahnement with the inclinedfloor 3 of the drum, thus providing an inclined gravity feed surfacefrom the interior of the drum to the outlet end section 12 of the pipewhich is directed downwardly into the flared mouth of the charging portC of the furnace. In connection with the pipe 10 it will be observedthat the same connects with the drum 2 at a point below the outlet endof the explosion pipe E, thus making it impossible for material thrownout of the pipe to follow a direct path from the said outlet into thepipe 10. In other words, when solid material is expelled from theexplosion pipe, it will be thrown into the receiving chamber R and thensettle around the end of the tube E within the chamber on the inclinedfloor 3,

from whence'it will slide or gravitate down the inclined interior of thepipe 10 and to the charging port of the furnace. To facilitate thereturn of the dust and finer materials discharged from the explosionpipe to the furnace, the upper or cap portion t of the drum 2 isprovided with a fine material gravity return pipe connection 13 whichconnects as at 14 with the said cap and as at 15 withthe outlet end 12of the coarse material pipe 10. This pipe 13 is intended to carry thefiner particles and dust back to the charging port of the, furnace morerapidly than would be the case if both coarse and fine material had tobe returned to the furnace by way-of the pipe 10. That is to say, thefiner particles of material, usually in the form of dust, hang in theupper portion of the receiving chamber R and do not settle until longafter the coarser material has passed back to the furnace by way of theinclined pipe and floor 3. Owing to the lightness of these particles,the same will not travel down the inclined surface just referred towithout some assistance, and therefore, the drum would always containmore or less fine material unless some agency were provided for removingthe same. In other words, owing to the weight of the coarse materialthat settlesaround the end of the pipe E on the inclined floor 3 thesame will readily slide down the incline3-11 which has only a relativelyslight pitch, and at the same time carry with it all of the finermaterial that may settle in a relatively short space of time.

However, as stated, the fine dust will remain suspended in the upperportion of the chamber R for some time after the heaviermaterials havebeen returned to the furnace. If

this dust should settle on the incline 3-11 after the coarse materialhas been thus disposed of, it would remain there indefinitely, and infact, probably necessitate manual assistance to returnto the furnace.However, this condition is obviated by the pipe 13, which is arranged atmuch greater pitch than the pipe 10, and communicates with the extremeupper portion of the drum, to facilitate the removal of fine materialfrom the upper part of the chamber. Thus, the pipe 13 fulfils itspurpose by providing a steep inclined surface for returning the finematerial to the furnace, while the pipe 10 provides an inclined surfaceof relatively less pitch for returning the coarse material to thefurnace.

Accordingly, it will be apparent that a novel and distinctive feature ofthe present invention is the provision of separate gravity return feedsurfaces, respectively arranged at different pitches and adapted toreturn both fine and coarse material to the charging port of thefurnace. These inclined or gravity return faces are respectivelydesignated as w and y, the former being provided by the pipe section 13while the latter comprises the inclined floor 3 at the bottom of thedrum and the inner surface 11 of the pipe section 10.

With the arrangement described, it will be clear that upon an explosionin the furnace, an eruption takes place, the force of which lifts thecone valve 6 from its seat at the outletend of the explosion pipe E, andall of the material expelled from the explosion pipe will becollected inthe receiving chamber R of the drum 2. The heavy solid particles willnaturally fall to the inclined floor 3, while the lighter particles willrise to the top of the drum and pass into the fine material return pipesection 13 from the curved neck section or elbow N, which connects thesaid pipe section with the cap t of the drum. On account of the steepinclination or pitch of the gravity return surface as, the fine materialwill be rapidly conducted to the discharge opening 12 which is common toboth of the gravity return surfaces as and y. The device, therefore,effectually provides for the return of'both solid and fine pieces ofore, coke and the like to the charging port of the furnace in a quickand effective manner.

Without further description, it is thought that the many features andadvantages of the invention will be readily understood, and it will, ofcourse, be understood that changes in the form, proportion and minordetails of construction may be resorted to without departing from thespirit of the invention or scope of the appended claims.

I claim: a

1. An attachment for blast furnaces, comprising a receiver carried bythe upper end of the furnace explosion pipe and having separate gravityreturn surfaces arranged at 'ise different pitches and both discharginginto the charging port of the furnace.

2. An attachment for blast furnaces comprising a receiver carried by theoutlet end of the furnace explosion pipe and comprising a receiving andcollecting drum having inclined gravity return surfaces arranged atdifferent pitches and discharging into the charging port of the furnace.

3. An attachment for blast furnaces, comprising a receiver carried bythe outlet end of the furnace explosion pipe and comprising a receivingand collecting drum having inclined gravity return surfaces leadingrespectively from the upper and lower ends of the drum and having acommon point of dis charge below the lower edge of the drum into thesaid charging port of the furnace.

' 4. An attachment for blast furnaces, comprising a receiver carried byand fitting over the outlet end of the furnace explosion pipe, saidreceiver having an inclined floor disposed below the outlet end of theexplosion pipe, a fine material gravity return surface communicatingwith the upper end of said drum, and a coarse material gravity returnsurface communicating with said drum at its lower end, said gravityreturn surface at the lower end of the drum being coincident with theinclined floor at the bottom of the drum.

5. An attachment for blast furnaces, comprising a receiving andcollecting drum fitted to the outlet of the furnace explosion pipe andhaving an inclined floor at its lower end, a conical cap member at itsother end having a central opening, a fine material conducting pipeconnecting with said cap member at the outlet thereof, and a coarsematerial conducting pipe section communi eating with the drum at itslower portion and having the lower inner face thereof coincident withthe inclined portion of the drum, said pipes having a common dischargeoutlet opening into the furnace charging portion.

6. An attachment for blast furnaces comprising a receiving andcollecting drum fitting over the outlet end of the furnace explosionpipe and having an inclined floor at its lower end, a conical cap memberat its upper end provided with a central outlet, a fine materialconducting outlet pipe communicating with said drum through the openingin the cap, a coarse material conducting pipe having one endcommunicating with the drum at the lower portion thereof and having itswall coincident and in the same plane with the inclined floor of thedrum, the other end of said pipe opposite its connection with the drumhaving a downwardly directed outlet, and said fine material conductingpipe having its discharge end opening into said downwardly directedoutlet of the coarse material pipe.

In testimony whereof I hereunto aflix my signature in the presence oftwo witnesses.

PASQUALE DE SIMONEY.

Witnesses:

C. G. RUDIBAUGH, H. G. GUSS.

Gopies of this patent may be obtained for five cents each, by addressingthe Gommissioner of Patents, Washington, D. 0.

